OAuth part

The minimum to pass all authentications and arrive at the embedded app
index. This library is to be used with shopify-app-template-c for now,
as it assumes the existence of shopify.app.toml in the parent directory,
and index.html in the frontend directory.

1 files changed, 13 insertions, 0 deletions

diff --git a/base64.h b/base64.h
new file mode 100644
index 0000000..8533af1
--- /dev/null
+++ b/base64.h
@@ -0,0 +1,13 @@
+#include <gnutls/gnutls.h>
+
+static inline void base64_decode(unsigned char *host, char **decoded_host)
+{
+	gnutls_datum_t result;
+	gnutls_base64_decode2(&(gnutls_datum_t){
+			host,
+			strlen((const char *)host)
+		}, &result);
+	*decoded_host = malloc(result.size + 1);
+	strlcpy(*decoded_host, (const char *)result.data, result.size + 1);
+	gnutls_free(result.data);
+}